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• the depth of the water at the end of a pier changes periodically along with the movement of tides. on a particular day, low tides occur at 12:00 am and 12:30 pm, with a depth of 2.5 m, while high tides occur at 6:15 am and 6:45 pm, with a depth of 5.5 m. let t = 0 be 12:00 am. write a cosine model, d = acos(bt) + k, for the depth as a function of time. this amplitude is meters. a =
  
• from the list below, choose which groups are part of the periodic table. metals acids flammable gases nonmetals semimetals ores conductors
  
• on a coordinate plane, triangle j k l has points (0, negative 1), (negative 2, 1), and (3, 3). reflect the triangle over the y-axis and find the coordinate of the image of point k. k’(2, 1) k’(–2, 1) k’(–2, –1) k’(2, –1)
  
• a combination washer/dryer costs $1,179. new parts for this washer/dryer cost $211, labor to repair it costs $553, and shipping it to and from a repair center costs $152. a full warranty, which covers all aspects of repairing the washer/dryer, costs 30% of the price of the washer/dryer. a limited warranty, which only covers labor costs, only costs 14% of the price of the washer/dryer. assuming that the washer/dryer needs repairs which include parts, labor, and shipping, which warranty is the better deal, and by how much, rounded to the nearest dollar? a. the limited warranty will end up costing the consumer $189 less. b. the limited warranty will end up costing the consumer $363 less. c. the full warranty will end up costing the consumer $553 less. d. the full warranty will end up costing the consumer $174 less.
  
• terry has just purchased a new car, which had a list price of $16,825. she had to pay 7.19% sales tax, a $1,128 vehicle registration fee, and a $190 documentation fee. terry traded in her previous vehicle, a 2003 honda element in good condition to use as a downpayment. the dealer paid full price for her trade in. she financed the rest of the cost over five years at an interest rate of 10.59%, compounded monthly. what is her monthly payment? (round all dollar values to the nearest cent.)
  
• which statement about agricultural production in africa is false? a. agricultural production has increased significantly since 1960. b. population is increasing, so the demand for food is also increasing. c. soil fertility and quality are decreasing. d. limited investment has been made in mechanization on the continent.
  
• elizabeth continued to save for her car down payment. what was her balance a after she made another deposit? responses $995 $995 $985 $985 $975 $975 $855
  
• which of the following reasons best explains why the american military relied on new technologies such as agent orange and napalm during the vietnam war?
  
• troublemakers"" perform poorly. this illustrates which explanation of deviance?
  
• the diagram shows a thermometer used to measure temperature. which refers to the area on the thermometer marked with the letter a? scale bulb mercury strip number line